Cummings, Ronald G. <br/><br/>
Valuing environmental goods. 
 An Assessment of the contigent valuation method 

 - Maryland :  Rowman & Littlefield,  1986. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0847674487 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Public goods -- Cost effectiveness.--Public goods -- Cost effectiveness.